(E)-4-Tributylstannanyl-but-3-enoic acid methyl ester

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: (E)-4-Tributylstannanyl-but-3-enoic acid methyl ester
• 化学式: C₁₇H₃₄O₂Sn
• 分子量: 389.166
• InChiKey: YESIYJRGWOPVAD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.49
• 重原子数：
  20
• 可旋转键数：
  13
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.82
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2,5-环已二烯-1,4-二酮2-溴-5-甲氧基- 、 (E)-4-Tributylstannanyl-but-3-enoic acid methyl ester 在 四(三苯基膦)钯 作用下， 以 六甲基磷酰三胺 、 甲苯 为溶剂， 反应 1.5h， 以64%的产率得到6-Hydroxy-7-methoxy-2H-chromene-2-carboxylic acid methyl ester
  参考文献：
  名称：

  Convergent synthesis of 2H-chromenes—a formal [3+3] cycloaddition by a one-pot, three-step cascade

  摘要：

  In cases in which the palladium-catalyzed coupling of a bromoquinone with a vinyl stannane affords a vinyl quinone that enolizes, the resulting ortho-quinone methide undergoes an oxa-6 pi electrocyclization. Enolization is promoted by the presence of a polar additive. The net conversion is a formal [3+3] cycloaddition that gives 2H-chromenes. Because the first two steps of the cascade are catalyzed, the overall conversion is an example of multicatalysis. Yields for the optimized, one-pot protocol are dramatically improved over the conventional stepwise process. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2011.09.068

文献信息

• Imidazole-5-acrylic acids: potent nonpeptide angiotensin II receptor antagonists designed using a novel peptide pharmacophore model
  作者：R. M. Keenan、J. Weinstock、J. A. Finkelstein、R. G. Franz、D. E. Gaitanopoulos、G. R. Girard、D. T. Hill、T. M. Morgan、J. M. Samanen

  DOI：10.1021/jm00099a013

  日期：1992.10

  l]-2- propenoic acid, has been shown to be a potent, competitive, and orally active small molecule AT-1 receptor antagonist. It exhibits a 2 orders of magnitude increase in binding affinity and a 10-fold improvement in in vivo potency as compared to compound 1 and represents an important milestone in the development of even more potent nonpeptide angiotensin II receptor antagonists.

  已经开发了一系列含有取代的（E）-丙烯酸的新型非肽血管紧张素II受体拮抗剂。专利文献中发现的1（一种咪唑5-乙酸）在AII的新型药效团模型上的覆盖物表明，酸侧链的延伸和第二个芳基残基的附着可模拟AII的C端苯丙氨酸区域会导致活动增加。对咪唑核C-5上延伸的酸侧链的研究导致发现（E）-丙烯酸5作为进一步探索的有希望的起点。如建模所预测的，在丙烯酸侧链上的苄基取代以模拟苯丙氨酸产生的效价增加。对新引入的芳环的SAR进行的广泛研究表明，富电子的杂芳基环具有更高的活性，尤其是在体内大鼠模型中。已经显示出化合物40，（E）-3- [2-丁基-1-[[（2-氯苯基）甲基]咪唑-5-基] -2-[（（2-噻吩基）甲基] -2-丙酸。成为有效，具有竞争性和口服活性的小分子AT-1受体拮抗剂。与化合物1相比，它的结合亲和力提高了2个数量级，体内效价提高了10倍，在开发更有效的非肽类血管紧张素II受体拮抗剂中
• Electrocyclic Ring Closure of the Enols of Vinyl Quinones. A <i>2H</i>-Chromene Synthesis
  作者：Kathlyn A. Parker、Thomas L. Mindt

  DOI：10.1021/ol0167199

  日期：2001.11.1

  Thermolysis of enolizable vinyl quinones in polar, aprotic media provides 2H-chromenes. Experimental evidence supports a two-step mechanism in which enolization is followed by a thermal 6pi-electrocyclic reaction of an intermediate quinone methide. Application of this method led to the total synthesis of the reputed structure of an Ageratum juvenile hormone. When enolizable vinyl quinones are the products

  极性非质子介质中可烯化的乙烯基醌的热解可提供2H-色烯。实验证据支持两步机理，其中烯醇化之后是中间体醌甲基化物的热6π-电环反应。该方法的应用导致了香ger子幼体激素的已知结构的全合成。当可烯化的乙烯基醌是斯蒂勒偶联的产物时，可直接获得色烯环化产物。[反应：看文字]
• Heterocycle Annulation of Enolizable Vinyl Quinone Imides. Dihydroquinolines and Quinolines from Thermal 6π-Electrocyclizations and Indoles from Photochemical Cyclizations
  作者：Kathlyn A. Parker、Thomas L. Mindt

  DOI：10.1021/ol026849x

  日期：2002.11.1

  text] Enolizable vinyl quinone mono- and diimide substrates yield protected 6-hydroxy and 6-amino dihydroquinolines by thermal electrocyclization. Aromatization provides the corresponding quinolines in quantitative yields. The quinone monoimide substrates undergo clean photochemical conversion to 5-hydroxy indoles.

  [反应：见正文]可烯化的乙烯基醌单和二酰亚胺底物通过热电环化反应生成受保护的6-羟基和6-氨基二氢喹啉。芳香化以定量产率提供相应的喹啉。醌单酰亚胺底物经过干净的光化学转化为5-羟基吲哚。
• TESOTf-Induced Rearrangement of Quinols. Efficient Construction of the Fully Functionalized Carbon Skeleton of the Griseusins by a Divergent−Reconvergent Approach
  作者：Kathlyn A. Parker、Thomas L. Mindt、Yung-hyo Koh

  DOI：10.1021/ol060206q

  日期：2006.4.1

  key reaction in a model sequence for the total synthesis produced two structurally divergent products, both were converted to the same advanced model intermediate that contains the complete carbon skeleton and (except for the extraneous oxygen substituent in the model series) the functional group pattern of the griseusins.

  [反应：见正文] 芳基 C-糖苷全合成的“反向极性”或“umpolung”策略是在抗生素 (-)-griseusin B 的背景下开发的。全合成产生了两种结构不同的产品，两者都被转化为相同的高级模型中间体，其中包含完整的碳骨架和（模型系列中的外来氧取代基）灰色素的官能团模式。
• Convergent synthesis of 2H-chromenes—a formal [3+3] cycloaddition by a one-pot, three-step cascade
  作者：Kathlyn A. Parker、Thomas L. Mindt

  DOI：10.1016/j.tet.2011.09.068

  日期：2011.12

  In cases in which the palladium-catalyzed coupling of a bromoquinone with a vinyl stannane affords a vinyl quinone that enolizes, the resulting ortho-quinone methide undergoes an oxa-6 pi electrocyclization. Enolization is promoted by the presence of a polar additive. The net conversion is a formal [3+3] cycloaddition that gives 2H-chromenes. Because the first two steps of the cascade are catalyzed, the overall conversion is an example of multicatalysis. Yields for the optimized, one-pot protocol are dramatically improved over the conventional stepwise process. (C) 2011 Elsevier Ltd. All rights reserved.